Volume discovery and local storage management lib
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os-brick/os_brick/exception.py

126 lines
3.8 KiB

# (c) Copyright 2013 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Exceptions for the Brick library."""
import six
from os_brick.i18n import _, _LE
from oslo_log import log as logging
LOG = logging.getLogger(__name__)
class BrickException(Exception):
"""Base Brick Exception
To correctly use this class, inherit from it and define
a 'msg_fmt' property. That msg_fmt will get printf'd
with the keyword arguments provided to the constructor.
"""
message = _("An unknown exception occurred.")
code = 500
headers = {}
safe = False
def __init__(self, message=None, **kwargs):
self.kwargs = kwargs
if 'code' not in self.kwargs:
try:
self.kwargs['code'] = self.code
except AttributeError:
pass
if not message:
try:
message = self.message % kwargs
except Exception:
# kwargs doesn't match a variable in the message
# log the issue and the kwargs
LOG.exception(_LE("Exception in string format operation. "
"msg='%s'"), self.message)
for name, value in kwargs.items():
LOG.error(_LE("%(name)s: %(value)s"), {'name': name,
'value': value})
# at least get the core message out if something happened
message = self.message
# Put the message in 'msg' so that we can access it. If we have it in
# message it will be overshadowed by the class' message attribute
self.msg = message
super(BrickException, self).__init__(message)
def __unicode__(self):
return six.text_type(self.msg)
class NotFound(BrickException):
message = _("Resource could not be found.")
code = 404
safe = True
class Invalid(BrickException):
message = _("Unacceptable parameters.")
code = 400
# Cannot be templated as the error syntax varies.
# msg needs to be constructed when raised.
class InvalidParameterValue(Invalid):
message = _("%(err)s")
class NoFibreChannelHostsFound(BrickException):
message = _("We are unable to locate any Fibre Channel devices.")
class NoFibreChannelVolumeDeviceFound(BrickException):
message = _("Unable to find a Fibre Channel volume device.")
class VolumeDeviceNotFound(BrickException):
message = _("Volume device not found at %(device)s.")
class VolumePathNotRemoved(BrickException):
message = _("Volume path %(volume_path)s was not removed in time.")
class ProtocolNotSupported(BrickException):
message = _("Connect to volume via protocol %(protocol)s not supported.")
class TargetPortalNotFound(BrickException):
message = _("Unable to find target portal %(target_portal)s.")
class FailedISCSITargetPortalLogin(BrickException):
message = _("Unable to login to iSCSI Target Portal")
class BlockDeviceReadOnly(BrickException):
message = _("Block device %(device)s is Read-Only.")
class VolumeGroupNotFound(BrickException):
message = _("Unable to find Volume Group: %(vg_name)s")
class VolumeGroupCreationFailed(BrickException):
message = _("Failed to create Volume Group: %(vg_name)s")